Power Shift Transmissions for Korean Telehandlers
The Ultimate Agricultural Gearbox Solution. Engineered for the steep gradients of Gangwon-do and the intensive load cycles of Hanwoo farming.
Redefining Torque Management in Compact Agricultural Spaces
In the evolving landscape of South Korean agriculture, the Telehandler (Telescopic Handler) is rapidly displacing traditional tractor front-loaders, particularly in the confined spaces of modern livestock complexes and rice processing centers (RPCs). However, the varied topography of Korea—from the flat reclaimed lands of Seosan to the rugged hills of Pyeongchang—demands a drivetrain that offers more than just lifting power. It requires a transmission capable of seamless torque delivery under variable traction conditions.
EVER-POWER’s T-Series Power Shift Transmission serves as the central agricultural gearbox, replacing standard hydrostatic drives in heavy-duty applications. Unlike hydrostatic systems that can suffer from heat-induced efficiency loss during continuous road travel or heavy towing, our mechanical power shift design utilizes a torque converter with a lock-up clutch. This ensures direct drive efficiency at high speeds while providing massive torque multiplication (up to 2.4:1) when digging into compacted manure or silage piles. The integration of proportional modulation valves eliminates “shift shock,” protecting the delicate load on the forks while maximizing operator comfort during long shifts.
Figure 1: High-capacity telehandler utilizing Ever-Power transmission for bale handling.
The Hybrid Advantage: Integrated Agricultural PTO Gearbox
A key differentiator for the Korean market is multi-functionality. Farmers often require their telehandlers to power rear-mounted attachments like straw blowers, fertilizer spreaders, or feed mixers. To meet this need, our transmission housing features a modular rear interface that accepts a dedicated agricultural pto gearbox unit.
This bolt-on pto gearbox module is not merely a pass-through shaft. It contains an independent wet multi-plate clutch, allowing the operator to engage or disengage the PTO output (540/1000 RPM) regardless of the vehicle’s ground speed. This “Live PTO” feature is critical for TMR (Total Mixed Ration) feeding operations, where the mixer must maintain constant RPM while the vehicle inches forward at varying speeds. The system is designed to handle shock loads up to 1200 Nm, ensuring reliability even when powering high-inertia implements.
Technical Specifications (Model: EP-TH400)
Optimized for 3.5 to 5-ton Telehandlers used in Agricultural Applications.
| Parameter | Specification | Notes |
|---|---|---|
| Max Input Power | 90 kW – 110 kW (120-150 HP) | Compatible with Stage V Diesel Engines |
| Transmission Type | Full Power Shift (Countershaft) | Electro-hydraulic modulation |
| Gear Steps | 4 Forward / 3 Reverse | Optional 6F/3R available |
| Torque Converter | Single Stage, 3-Element | Stall Ratio: 2.34:1 |
| System Pressure | 18 – 22 Bar | Main Clutch Pressure |
| PTO Output | 540 / 1000 RPM (Shiftable) | Via integrated pto gearbox module |
| Max Travel Speed | 40 km/h | Road Homologation Ready |
| Control Voltage | 12V or 24V DC | Proportional Solenoids |
| Dry Weight | 285 kg | Without Oil |
| Housing Material | Cast Iron (QT450-10) | High tensile strength for chassis integration |
Regional Compliance & Climate Adaptation (South Korea)
Cold Start Capability
Winter temperatures in Gangwon-do can drop below -20°C. Standard transmission fluids thicken, causing sluggish shifting or pump cavitation. Our gearboxes are factory-filled with high-VI (Viscosity Index) synthetic ATF and feature an internal bypass valve that accelerates fluid warm-up, ensuring operational readiness within minutes of engine start.
Safety & Standards (FACT)
To meet the strict requirements of the Foundation of Agri. Tech. Commercialization & Transfer (FACT) in Korea, our transmission includes a neutral-start safety switch and an electric park brake interlock. The pto gearbox output shaft is fully guarded according to KS B ISO 4254-1 safety standards.
Hill Hold & Inching
For operations on sloped terrain, typical of Korean orchards, our transmission features an electronic “Inching” function. This declutches the transmission proportionally to brake pedal pressure, allowing high engine RPM for hydraulic boom speed while maintaining precise, slow ground movement—essential for safe pallet stacking on hills.
Proven Performance: Field Case Studies
Why Partner with EVER-POWER?
In the specialized world of agricultural gearbox manufacturing, precision and durability are non-negotiable. EVER-POWER brings over two decades of expertise in drivetrain engineering, bridging the gap between rugged durability and modern electronic control. Unlike generic suppliers, we control the entire manufacturing process—from the forging of the gear blanks to the final dyno-testing of the transmission assembly.
For our Korean partners, we offer a dedicated support channel that understands the nuances of local regulations (KS standards) and operational habits. Our agile manufacturing capability allows for the customization of gear ratios and PTO interfaces to suit specific telehandler models, whether for compact barn use or large-scale construction. By choosing EVER-POWER, you gain access to a supply chain that prioritizes quality consistency, competitive B2B pricing, and technical transparency.
Frequently Asked Questions (FAQ)
Q1: How does a Power Shift transmission differ from a Hydrostatic drive in agricultural use?
Power Shift transmissions use mechanical gears and a torque converter, offering higher efficiency at road speeds and greater towing capacity. Hydrostatic drives offer infinite speed control but can generate excessive heat under heavy loads. For heavy-duty telehandlers (3.5 tons+), Power Shift is generally preferred for durability.
Q2: Can I retrofit this transmission to an older machine?
Retrofitting depends on the chassis space and engine mounting points. Our EP-TH400 uses standard SAE bell housings. However, the electrical control system (ECU) must be integrated. We recommend this for OEM new builds or complete powertrain refurbishments rather than simple field swaps.
Q3: What maintenance is required for the agricultural pto gearbox module?
The PTO module shares the oil supply with the main transmission in some models, or has a separate sump in others. Check the oil level every 250 hours. The wet clutch plates are maintenance-free but require clean oil to prevent glazing. Replace filters every 500 hours.
Q4: Is the transmission compatible with CAN-bus control systems?
Yes, our Transmission Control Unit (TCU) communicates via SAE J1939 CAN-bus. This allows it to talk to the engine ECU for smooth shifting (torque reduction during shifts) and to the dashboard for diagnostics.
Q5: What oil should be used for Korean winters?
We recommend a Universal Tractor Transmission Oil (UTTO) or a high-quality ATF that meets the Dexron III or higher specification, specifically chosen for low-temperature flow properties to ensure immediate lubrication at -20°C.
Ready to Upgrade Your Telehandler’s Drivetrain?
Contact EVER-POWER today for detailed CAD models, pricing, and distribution opportunities in South Korea.
Editor: Cxm
